ColorPreference.java

/*
 * Copyright (C) 2015 Daniel Nilsson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package afzkl.development.colorpickerview.preference;

import afzkl.development.colorpickerview.R;
import afzkl.development.colorpickerview.view.ColorPanelView;
import android.content.Context;
import android.content.res.TypedArray;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;

public class ColorPreference extends Preference {

	public interface OnShowDialogListener {
		public void onShowColorPickerDialog(String title, int currentColor);
	}
	
	private OnShowDialogListener mListener;
	
	private int mColor = 0xFF000000;
	
	
	public ColorPreference(Context context, AttributeSet attrs) {
		super(context, attrs);
		init(attrs);
	}
	
	public ColorPreference(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);		
		init(attrs); 
		
	}
	
	private void init(AttributeSet attrs) {
		setPersistent(true);	
		
		setWidgetLayoutResource(R.layout.preference_preview_layout);
		
		setOnPreferenceClickListener(new OnPreferenceClickListener() {
			
			@Override
			public boolean onPreferenceClick(Preference preference) {
				
				if(mListener != null) {
					mListener.onShowColorPickerDialog((String) getTitle(), mColor);
					return true;
				}
				else {
					throw new IllegalArgumentException(
							"You must first call setOnShowDialogListener() and " 
									+ "handle showing the ColorPickerDialogFragment yourself.");
				}				
			}
		});
	}
	
	
	/**
	 * Since the color picker dialog is now a DialogFragment
	 * this preference cannot take care of showing it without
	 * access to the fragment manager. Therefore I leave it up to
	 * you to actually show the dialog once the preference is clicked.
	 * 
	 * Call saveValue() once you have a color to save.
	 * @param listener
	 */
	public void setOnShowDialogListener(OnShowDialogListener listener) {
		mListener = listener;
	}
		
	
	@Override
	protected void onBindView(View view) {
		super.onBindView(view);
		
		ColorPanelView preview = (ColorPanelView) view.findViewById(R.id.preference_preview_color_panel);
		
		if(preview != null) {
			preview.setColor(mColor);
		}
		
	}
	
	@Override
	protected void onSetInitialValue(boolean restorePersistedValue, Object defaultValue) {		
		if(restorePersistedValue) {
			mColor = getPersistedInt(0xFF000000);
			//Log.d("mColorPicker", "Load saved color: " + mColor);
		}
		else {
			mColor = (Integer)defaultValue;
			persistInt(mColor);
		}
	}
	
	@Override
	protected Object onGetDefaultValue(TypedArray a, int index) {
		return a.getInteger(index, 0xFF000000);
	}
	
	
	public void saveValue(int color) {
		mColor = color;
		persistInt(mColor);
		notifyChanged();
	}
	
}